Parameters related to roaming can be changed in Global window of SCU.
When roaming between several APs is required, WLAN must be configured accordingly to avoid interference between other channels.
Theoretically, roaming is possible if you set the same SSID, Encryption, authentication and etc for all APs. All of these can be configured using SCU.
When moving average RSSI from current AP is weaker than Roam Trigger, radio does a roam scan where it probes for an AP with a signal that is at least Roam Delta dBm stronger.
Default value is 70DB, thus set the trigger value as fit to user environment.